fix: width not divisable by 2 error
fix: width not divisable by 2 error

passing -2 instead of -1 lets the filter handle the
correction instead having to do something ugly like

scale=trunc(in_w/2)*2:trunc(in_h/2)*2

or similar

inbre001/windowVideoCapture,inbre001/windowVideoCapture,inbre001/windowVideoCapture